"I don't think Robert will be pleased and it affects the team," said Pulis.
"But everyone makes mistakes, and he will be big enough and strong enough to hold his hand up and say that what he did was wrong."
The clash with Senderos was not seen by the match officials, but the FA took action after reviewing video evidence.
"Robert has been fantastic for this football club - a great player and one of the signings we will look back on and say 'what a wonderful signing'," added Pulis.
"But I think he has let himself down more than anything else."